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What are the types of speakers-Alice factory

2021/08/30

1. Airtight speaker

Closed enclosure (Closed Enclosure) is the simplest speaker system. It was proposed by Frederick in 1923. It consists of a speaker unit installed in a fully sealed cabinet. It can completely isolate the forward and backward radiated sound waves of the speaker. Due to the existence of the closed box, the rigidity of the resonance of the motion mass of the speaker is increased, and the minimum resonance frequency of the speaker is increased.

2. Bass reflex speakers

It is also called an inverted speaker. It was invented by Thuras in 1930. In its load, there is a sound outlet opening on a panel of the cabinet. There are various positions and shapes of the openings, but most of them are also equipped with sound ducts. .

3. Acoustic resistance speakers

Acoustic resistance speaker is essentially a deformation of an inverted speaker. It is filled with sound-absorbing material or structure in the sound outlet duct, acting as a semi-closed box to control and guide it, buffer it, and reduce the vibration frequency to broaden the bass. Replay frequency band.

4. Transmission line speaker

The transmission line speaker is named after the transmission line of the classical electrical theory. There is a sound tube made of sound-absorbing wall panels on the back of the speaker. In theory, it attenuates the sound wave coming from behind the cone, preventing it from being reflected to the open end and affecting the sound radiation of the woofer.

5. Passive radiating speakers

Passive radiating speakers are a branch of bass reflex speakers, also known as empty cone speakers. It was published by Olson and Preston in the United States in 1954. Its opening sound outlet was replaced by an empty paper cone (passive cone) without a magnetic circuit and voice coil.

The radiated sound generated by the vibration of the passive cone and the forward radiated sound of the loudspeaker are in the same phase working state, and the composite sound and the passive cone quality formed by the air in the box and the passive cone supporting element are used to form resonance to enhance the bass.

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Alice's signs are flat in workmanship and strong in three-dimensionality. They are a common surface treatment process and have a wide range of applications. For example, signs can be used in audio, household appliances, refrigerators, computers, and security products.

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